The　research　on　the　spatial　governance　of　the　suburbs　of　megacities　is　of　great　significance　for　coordinating　the　spatial　relationship　between　the　central　urban　area　and　the　suburbs　of　megacities,　and　implementing　the　regional　functional　layout　of　megacities.　It　is　helpful　to　formulate　scientific　spatial　governance　strategies,　and　coordinate　suburban　space　and　central　urban　areas　to　achieve　coordinated　and　sustainable　development.　This　paper　uses　spatial　form　indicators　to　study　suburban　space　governance　from　the　spatial　evolution　characteristics　of　suburban　construction　land,　constructs　the　relationship　between　different　spatial　evolution　characteristics　and　the　utility　of　spatial　governance　tools　in　the　suburbs　of　megacities,　and　discusses　the　mechanism　of　suburban　spatial　governance　tools.　The　study　found　that　the　spatial　governance　of　megacities　runs　through　the　whole　process　of　spatial　evolution.　Together　with　the　three　stages　of　space　evolution,　＂space　shaping,　space　restoration,　space　reconstruction＂,　we　present　three　spatial　governance　mechanism　types:　＂extensive　development　with　positive　guidance　as　the　theme＂,　＂exploratory　adjustment　with　transformation　practice　as　the　theme＂,　＂fine　governance　with　management　and　control　intervention　as　the　theme＂.　In　addition,　the　study　also　found　that　direct　and　indirect　suburban　space　governance　tools　have　different　action　paths　and　usage　characteristics,　and　there　is　a　synergistic　mechanism　between　the　two　types　of　tools.